A shelf is a flat, horizontal surface used for storing or displaying items. It can be made from various materials, such as wood, metal, or glass, and is commonly found in homes, offices, and stores. Shelves can be mounted on walls or supported by brackets and are used to organize books, decorative items, or other belongings. Shelves come in different sizes and styles, including bookshelves, floating shelves, and corner shelves. They help maximize space and keep areas tidy. In addition to their practical use, shelves can also enhance the aesthetic appeal of a room by showcasing personal collections or artwork.